Background: Psychosocial disorders ranging from anxiety to severe psychiatric diseases and active alcohol/substance abuse are frequent in liver transplant candidates and potentially associated with worse post-transplant outcomes. Therefore, psychosocial evaluation is mandatory to optimize success after liver transplantation. However, how to carry out this evaluation, the type of intervention needed and its potential impact on patient outcome remain unclear.Objectives: To investigate whether psychosocial assessment may help in predicting risks of poor outcome; and to investigate whether psychosocial interventions may mitigate these risks and improve posttransplant outcomes, in particular compliance and speed of recovery.Data sources: Ovid MEDLINE, Embase, Scopus, Google Scholar, and Cochrane Central.Methods: Systematic review following PRISMA guidelines and recommendations using the GRADE approach derived from an international expert panel. The protocol